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    Subject[PATCH v3 3/7] perf vendor events: Add JSON metrics for CMN
    Date
    Add JSON metrics for arm CMN. Currently just add part of CMN PMU
    metrics which are general and compatible for any SoC and CMN-ANY.

    Signed-off-by: Jing Zhang <renyu.zj@linux.alibaba.com>
    ---
    .../pmu-events/arch/arm64/arm/cmn/sys/metrics.json | 74 ++++++++++++++++++++++
    tools/perf/pmu-events/jevents.py | 1 +
    2 files changed, 75 insertions(+)
    create mode 100644 tools/perf/pmu-events/arch/arm64/arm/cmn/sys/metrics.json

    diff --git a/tools/perf/pmu-events/arch/arm64/arm/cmn/sys/metrics.json b/tools/perf/pmu-events/arch/arm64/arm/cmn/sys/metrics.json
    new file mode 100644
    index 0000000..e70ac1a
    --- /dev/null
    +++ b/tools/perf/pmu-events/arch/arm64/arm/cmn/sys/metrics.json
    @@ -0,0 +1,74 @@
    +[
    + {
    + "MetricName": "slc_miss_rate",
    + "BriefDescription": "The system level cache miss rate include.",
    + "MetricGroup": "arm_cmn",
    + "MetricExpr": "hnf_cache_miss / hnf_slc_sf_cache_access",
    + "ScaleUnit": "100%",
    + "Unit": "arm_cmn",
    + "Compat": "arm_cmn600;arm_cmn650;arm_cmn700;arm_ci700"
    + },
    + {
    + "MetricName": "hnf_message_retry_rate",
    + "BriefDescription": "HN-F message retry rate indicates whether a lack of credits is causing the bottlenecks.",
    + "MetricGroup": "arm_cmn",
    + "MetricExpr": "hnf_pocq_retry / hnf_pocq_reqs_recvd",
    + "ScaleUnit": "100%",
    + "Unit": "arm_cmn",
    + "Compat": "arm_cmn600;arm_cmn650;arm_cmn700;arm_ci700"
    + },
    + {
    + "MetricName": "sf_hit_rate",
    + "BriefDescription": "Snoop filter hit rate can be used to measure the Snoop Filter efficiency.",
    + "MetricGroup": "arm_cmn",
    + "MetricExpr": "hnf_sf_hit / hnf_slc_sf_cache_access",
    + "ScaleUnit": "100%",
    + "Unit": "arm_cmn",
    + "Compat": "arm_cmn600;arm_cmn650;arm_cmn700;arm_ci700"
    + },
    + {
    + "MetricName": "mc_message_retry_rate",
    + "BriefDescription": "The memory controller request retries rate indicates whether the memory controller is the bottleneck.",
    + "MetricGroup": "arm_cmn",
    + "MetricExpr": "hnf_mc_retries / hnf_mc_reqs",
    + "ScaleUnit": "100%",
    + "Unit": "arm_cmn",
    + "Compat": "arm_cmn600;arm_cmn650;arm_cmn700;arm_ci700"
    + },
    + {
    + "MetricName": "rni_actual_read_bandwidth.all",
    + "BriefDescription": "This event measure the actual bandwidth(MB/sec) that RN-I bridge sends to the interconnect.",
    + "MetricGroup": "arm_cmn",
    + "MetricExpr": "rnid_rxdat_flits * 32 / 1e6 / duration_time",
    + "ScaleUnit": "1MB/s",
    + "Unit": "arm_cmn",
    + "Compat": "arm_cmn600;arm_cmn650;arm_cmn700;arm_ci700"
    + },
    + {
    + "MetricName": "rni_actual_write_bandwidth.all",
    + "BriefDescription": "This event measures the actual write bandwidth(MB/sec) at RN-I bridges.",
    + "MetricGroup": "arm_cmn",
    + "MetricExpr": "rnid_txdat_flits * 32 / 1e6 / duration_time",
    + "ScaleUnit": "1MB/s",
    + "Unit": "arm_cmn",
    + "Compat": "arm_cmn600;arm_cmn650;arm_cmn700;arm_ci700"
    + },
    + {
    + "MetricName": "rni_retry_rate",
    + "BriefDescription": "RN-I bridge retry rate indicates whether the memory controller is the bottleneck.",
    + "MetricGroup": "arm_cmn",
    + "MetricExpr": "rnid_txreq_flits_retried / rnid_txreq_flits_total",
    + "ScaleUnit": "100%",
    + "Unit": "arm_cmn",
    + "Compat": "arm_cmn600;arm_cmn650;arm_cmn700;arm_ci700"
    + },
    + {
    + "MetricName": "sbsx_actual_write_bandwidth.all",
    + "BriefDescription": "sbsx actual write bandwidth(MB/sec).",
    + "MetricGroup": "arm_cmn",
    + "MetricExpr": "sbsx_txdat_flitv * 32 / 1e6 / duration_time",
    + "ScaleUnit": "1MB/s",
    + "Unit": "arm_cmn",
    + "Compat": "arm_cmn600;arm_cmn650;arm_cmn700;arm_ci700"
    + }
    +]
    diff --git a/tools/perf/pmu-events/jevents.py b/tools/perf/pmu-events/jevents.py
    index 2bcd07c..7cff2c6 100755
    --- a/tools/perf/pmu-events/jevents.py
    +++ b/tools/perf/pmu-events/jevents.py
    @@ -256,6 +256,7 @@ class JsonEvent:
    'DFPMC': 'amd_df',
    'cpu_core': 'cpu_core',
    'cpu_atom': 'cpu_atom',
    + 'arm_cmn': 'arm_cmn',
    }
    return table[unit] if unit in table else f'uncore_{unit.lower()}'

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